package com.fulin.netty;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;

public class DiscardServer {
	private int port;
	private ChannelInboundHandlerAdapter serverHandler;
	
	public DiscardServer(int port,ChannelInboundHandlerAdapter serverHandler){
		this.port = port;
		this.serverHandler = serverHandler;
	}
	
	public void run() throws Exception {
		EventLoopGroup bossGroup = new NioEventLoopGroup();
		EventLoopGroup workerGroup = new NioEventLoopGroup();
		
		try{
			ServerBootstrap b = new ServerBootstrap();
			b.group(bossGroup,workerGroup)
				.channel(NioServerSocketChannel.class)
				.childHandler(new ChannelInitializer<SocketChannel>(){
					@Override
					protected void initChannel(SocketChannel ch) throws Exception {
						ch.pipeline().addLast(serverHandler);
					}
				})
				.option(ChannelOption.SO_BACKLOG, 128)
				.childOption(ChannelOption.SO_KEEPALIVE, true);
			
			//bind and start to accept incoming connections.
			ChannelFuture f = b.bind(port).sync();
			
			//wait until the server socket is closed.
			//In this example , this does not happen, but you can do that to gracefully
			//shut down your server.
			f.channel().closeFuture().sync();
		}finally{
			workerGroup.shutdownGracefully();
			bossGroup.shutdownGracefully();
		}
	}
	
	public static void main(String[] args) throws Exception {
		int port;
		if(args.length > 0){
			port = Integer.parseInt(args[0]);
		}else{
			port = 8080;
		}
//		new DiscardServer(port,new DiscardServerHandler()).run();
		new DiscardServer(port,new TimeServerHandler()).run();
	}
}
